CC(=O)[C@@H]1C(=O)OC(=O)C=C1C    mol12514    0_1
[CH2-]C(=O)[C@@H]1C(=O)OC(=O)C=C1C    mol12514    -1_1
CC(=O)[c-]1c(C)cc(=O)oc1=O    mol12514    -1_2